package com.maxsalad.common.util;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PropertiesLoaderUtils;

import java.io.File;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

/**
 * Created by 2014-400 on 2016-01-26.
 */
public class PropertiesUtil {
    private static final Logger log = LoggerFactory.getLogger(PropertiesUtil.class);

    /**
     * jdk自带方法获取
     *
     * @param file
     * @return
     */
    private static Properties getPropertiesByClassPath(String file) {
        try {
            InputStream is = ClassLoader.getSystemResourceAsStream(file);
            Properties props = new Properties();
            props.load(is);
            return props;
        } catch (Exception e) {
            log.error("PropertiesUtil getPropertiesByClassPath is error ", e);
            return null;
        }

    }

    /**
     * 用spring工具类获取
     *
     * @param file
     * @return
     */
    public static Properties getPropertiesByResource(String file) {
        try {
            Resource resource = new ClassPathResource(file);
            Properties props = PropertiesLoaderUtils.loadProperties(resource);
            return props;
        } catch (Exception e) {
            log.error("PropertiesUtil getPropertiesByResource is error ", e);
            return null;
        }
    }

    public static Properties getProperties(String fileName) throws Exception {
        Properties props = getPropertiesByResource(fileName);
        if (null == props) {
            props = getPropertiesByClassPath(fileName);
        }

        return props;
    }

    public static Map<String, String> getMap(String fileName) throws Exception {
        Properties properties = getProperties(fileName);

        Map map = new HashMap<String, String>();
        for (Object key : properties.keySet()) {
            map.put(key.toString(), properties.getProperty(key.toString(), ""));
        }

        return map;
    }

    /**
     * ********************************************************************************************************************
     */
    private static Map<String, String> configMap = null;

    private static String getFileName() {
        String active = System.getProperty("spring.profiles.active");
        if (StringUtils.isBlank(active)) {
            active = "production";
        }

        return "properties" + File.separator + "core-" + active + ".properties";
    }

    public static String getValue(String key) throws Exception {
        if (configMap == null || configMap.size() == 0) {
            String fileName = getFileName();
            configMap = getMap(fileName);
        }

        return configMap.get(key);
    }
}

